---
title: GoodFET21
---
<h1>GoodFET21</h1>

<p>The GoodFET21 is the sixth hardware revision of the GoodFET, owing
its heritage to the <a href="/hardware/badfet20/">BadFET20</a>
and <a href="/hardware/goodfet30/">GoodFET30</a>.  It retains the more
powerful MCU of the BadFET20 while adopting the GoodFET30's smaller
board and lack of crystals.  The 74HC4053 MUX has been dropped from
the design, and glitching is now performed directly from the MCU's
DAC.
</p>

<h2>CAD Files</h2>

<p>Eagle CAD 5.x files for the design can be found in
/branches/goodfet21 of the subversion repository, or as
<a href="/releases/goodfet21.zip">goodfet21.zip</a>.</p>

<h2>Bill of Materials</h2>

<table border="1">
<tr><td>Quantity</td><td>Package</td><td></td></tr>
<tr><td>1</td><td>SSOP28</td><td>FT232RL</td></tr>
<tr><td>1</td><td>QFP64</td><td>MSP430F2618</td></tr>
<tr><td>2</td><td>0603</td><td>0.1&mu;F Decoupling Capacitors</td></tr>
<tr><td>3</td><td>0603</td><td>0603 LED</td></tr>
<tr><td>2</td><td>0603</td><td>330R LED Series Resistors</td></tr>
<tr><td>6</td><td>0603</td><td>100R JTAG Series Resistors</td></tr>
<tr><td>1</td><td>0603</td><td>47K !RST Pull-up Resistor</td></tr>
</table>

<p>Resistor values can be approximated.  Be sure to get the 64 pin
variant of the MSP430F2618.</p>

<h2>Construction</h2>

<a href="http://www.flickr.com/photos/travisgoodspeed/4161224496/"
title="GoodFET21 by Travis Goodspeed, on
Flickr"><img src="http://farm3.static.flickr.com/2788/4161224496_e3638b1493.jpg"
width="500" height="180" alt="GoodFET21" /></a>
</p>

<a href="http://www.flickr.com/photos/travisgoodspeed/4163020683/"
title="GoodFET21 Schematic by Travis Goodspeed, on
Flickr"><img src="http://farm3.static.flickr.com/2633/4163020683_1081ac8f02.jpg"
width="500" height="276" alt="GoodFET21 Schematic" /></a>

<h2>Errata</h2>

<p>None so far!</p>

